Fixed issue causing app not to start.

Author: vigoux

application.py

@@ -337,7 +337,7 @@ def __init__(self, master=None):
 
         if os.path.exists("VERSION_INFO"):
             with open("VERSION_INFO", "r") as file:
-                self._version = file.read_all()
+                self._version = file.read_lines()[0]
 
         logger.debug("Loading config file.")
         try:  # to open preceding config file